Fastening device



Nov. 24, 1953 E. scHLUETER 2,659,952

FASTENING DEVICE Filed Jan. 5, 1945 ER/VEST SCHL UEEB Armen/fx Patented Nov. 24, 19573 FASTENING DEVICE AErnest Schlueter, Hollis, N. Y., assignor, by mesne assignments, to Simmons Fastener Corporation, Albany, N. Y., a corporationof New York Application January 5, 1945, seria1No. 5`71,41z

3 Claims.

l 'I :This: inventionL relates' to' fastening devicesand Amore' "particularly Ato fastening "devices'adapted it be securedr in a member or for securingt g hersuperposed members or plates.

'V e'sjand toprovide an extremelyr simple device thi kind which is quick, convenient, durable a reliable in operation, very economical'to flnariufacture an'd easy tof install.

'.heinventive Yfeatures forthe accomplish- K fnl nt offtheseand other objects are shown herein .ihnmonnection with ay number of fastening de- Yell QfuWhCh bey Stated includes a l. ture, @Meanies endet. the. 0111161'v end l1 wheas forming'a lateral, ilaria@ and hav*- 1 receiving faces- A Sirone locking mems J V ber disposed in said aperture has projetine' en,-

`gagingend-partsY 'at the sides `of the stud andf 'lengageablewithparts tobe held.

C Afspecial objectfofithe invention toprovide fea'sily and economically vproduced structure` to @provide the` transverse aperture `inthe stucL '.:fSaiddevcefis 'adapted to .hold together super- :lposediouter and inner members having alined -holeslthrough which the studl passes, the locking n'iemb'er engaging the exposed face or the interior voflthe inner member. `In some forms, n'otches arelprovided at vthe holes for the passage fof-Athei'endsoff theslocking member; while in some, the ends of the locking memberfpush vfasiderthe material `ofA one or both ofv the superi posed members.

. F'Inthesaccompanying drawing showing, by Way Lof (example, a! number of many possibleemfbodiments of the invention,

'Fig." aside elevation showing'Y one form volf'fastening'device of my invention ready to be "assembled; l

Fig; 2 1is a side elevation showingv the device "holding togetherl a pairoff plate members;

is asimnarside elevation taken art-right *angles toFig. 2'and showing! the plate members lin`s"`e'c`tion;` y

\ igs; 4, 5 and 6 are respectively 'plan and'side felevaltionsshowingfthe-inner end of a blank-stud before the aperture isformed therein;

7 isa side elevation, partly in section,

showing-f a pairfof superposed plates held torltogetherby-a` stud having two apertures each having therein a yoke part of alocking member, eachllockinglmember-having'two arms.

l' "Thefsimple Vfastening device of Figs.v .r yto 6 is Qbjeots ofthe invention'are' to effectv extreme m sfi'mplic'ity and. efliciency in such iastening de- -Siulsforzidei` neerthe inner @ed with, a transles 2 adapted to `hold together superpose'd 'members asin Figs. 2 to 6.

As-shown in Figs. 2 to'4 the -fastening -device of Fig. 1 is adaptedto hold together-superposed outer and innereplatemembers Il), vlll having `punched or otherwise provided therein coaxial holesl2, |13, the holes respectively havingjsma'll opposite marginal notches lll,` l5, iThe notches of `each plate member-"may be o iset Vfronrjlas.

rshown in Figs.V 2 and 3') or'registering withythe.

notches in the other plate member. l

The fastener I 6, zljcomprisesa s'tudwll-"dis-l kposable in said holesjand provided near vthe innerend with aA transverse aperture'I-l and at'ffthe outer end with -a headv I'Shaving 4a-transverse slotv I9 and forming a ange; 20; engageable with lthe outer face of the [outer member lil. "As-ubstantially U -shaped locking -member'`21 of Strong velastic Wire having "aj straight't transverse 'yoke 22 in said'A aperture ll has arms 23^`initially-di`sposed longitudinallyv of' opposite sides *of `the stud almost to the ange, as in Fig.- 1. f

Said arms 23 are adaptedy when --theystud-is passed intothe hole 2 'inftheouter platejm'em- 4ber only and rotated-forwardly byengagenent of a tool in the slotk I9, to cam^agains`tvfthe inner face of the outer plate,` and automatically vincline the arms' and make cams thereofglfplacing the arms slightly diagonally with-"the-arm ends against 'the `inner face of the outer-'plate betweenV the 'notchesthe reo`f, thus iholding the Studl inr position Vto `bevpassed into'thehole in the inner plate member `I'l y-withythe-arms passing throughr the notches I5 'thereof,frota tion of Vthe, stud causing `the arms to cam on the inner plate member IIfand the armgends 'to engage the exposed'4 face of theginnerf-plat'e member between the notchesv `l5 to;l 1old-the members and 'study in, place asin Figs. 2- and-3. A quarter turn further rotation "of lthe?y stud bringsA the arm ends tothe notches of the inner member thus unlocking them and the stud Lfrom the inner platemember. "jStill further rotation will bring thea-rmsVto thefnotches'Y 1| 4-#andf Arelease the stud from the outer member.

In the form of inventionfoflig; 7',Vv the; fasten- 'ing'` device is`v shown iny combination with,I super- 4posedV outer and inner.A plate members. Lila- Ila having coaxial holes 12a, 13a-therein, each hole having fo'ur small marginalnnotches l4a,`"l5a evenly distributed. aroundA thel hole, the notches of each plate memberbeing shown registering f with the notchesl inthe other 'plate member.

The stud lv6al disposablel in Isaidholesefissprof vided with.' a 'pair-` of= lvtransverse:Fapertures: "lil,

Ila at right angles to each other, but offset from each other longitudinally of the stud, the stud having at the outer end a slotted head |8a engageable with the outer face of the outer member Illa. i

Pairs of substantially U-shaped locking wire members have straight transverse yokes in one of the respective apertures and each has two arms 23, 23a initially disposed longitudinally of opposite sides of the stud, the arms 23a on the yoke nearest the head being shorter than the other arms, all arms extending almost to the flange, whereby the stud may be passed into the holes in the plate members with the arms passing through the notches thereof, rotation of the stud causing the arms to cam on the inner plate member and the arm ends to engage the inner plate member, to hold the stud in place. Further rotation of the stud and arms may release the stud from the plates as in Figs. 1 to 3. The four Yarms give additional holding ystrength to the fastener; but the invention is not limited to any special number of arms.

The head la of Figs. 7 and 8 has diamet- `rically opposite approximately quadrant-shaped approximately fiat-bottomed recesses 35, each having at its forward edge an adjacent face forming an approximately radial rearwardly facing shoulder 36, the rear part of each recess 35 being concaved and outwardly curved away from the bottom of the recess to form a cammed rear wall 31. Said recesses communicate at the axis, said shoulders being offset from each other to provide a communicating space 40 whereby the recesses are adapted to receive a straight edge screw-driver bit across said space with its oppositeV faces engaging said shoulders 35 Whereby the studemay be turned forwardly only, said cammed rear walls 31 camming the screw-driver from the head when the screw driver is turned rearwardly, thereby to prevent, the stud from being turned backwardly. The head |8a of Figs. '7 and 8 may be used with the stud of Figs. 1 to 3 or the head I8 of Figs. 1 to 3 may be used with the stud Ilia.

The aperture may be formed by initially providing at the inner end of the stud a deep transverse slot 25 open at the end (Figs. 5 to 7) having a rounded bottom 26 and having on its opposite sides a pair of approximately right-triangular projections 21, 28, the free apexes 29. 30 of the respective projections being at opposite ends of the slot. Each apex portion is then bent directly over the adjacent end of the slot, the apex being brought to the lower end 32, 33 of the hypotenuse of the opposite projection and rounded over the wire yoke or the rounded bottom to enclose completely the sides of the aperture Il on a diagonal line 34 (Fig. 4) and to complete the rounded end of the stud.

This method of forming the aperture is valuable as the projections may be formed, bent over and rounded with only one or two strokes of the forming tool.

The invention claimed is:

l. A stud element adapted to be secured in a hole in a work structure having adjacent to the hole opposite engagement portions having exposed engagement faces, said element comprising a stud rotatable in said hole and having a head engageable with the outer face of said structure; the inner end portion of the stud remote from the head being provided with a transverse aperture; said end portion havingat 4 their bases at opposite sides of the adjacent aperture, the apexes of the triangular portions being at opposite ends of the aperture, the apex part of each portion being a curved portion forming a hook disposed over the aperture and contacting the other portion at the end of the aperture remote from the apex part of said other portion said portions enclosing completely the sides of the aperture; and a substantially U-shaped locking wire member having a straight transverse yoke in one of said apertures and two arms disposed spirally at opposite sides of the stud and engaging said engagement faces; said hooks having a special definite coaction of preventing the stress on the arms by the work structure from causing the yoke to wedge the triangular portions apart.

2. A stud element adapted to be secured in a hole in a work structure having at its inner face marginal notches in the hole and engagement portions therebetween having exposed engagement faces, said element comprising a stud rotatable in said hole and having VYa head engageable with the outer face of said structure; the inner end portion of the stud being provided with a transverse aperture and having at the free end a pair of triangular portions having their bases at opposite sides of the aperture, the apexes of the triangular portions being at opposite ends of the aperture, the apex part of each portion extending to the opposite side of the aperture from its base and being curved over the aperture to form a hook and contacting the other portion at the end of the aperture remote from the apex part of said other portion; said portions contacting each other from apex to base and enclosing completely the sides of the aperture, the outer faces of said portions forming a rounded end of the stud; and a substantially U-shaped wire locking member having a straight transverse yoke in one of said V apertures and two arms adapted to be initially disposed `longitudinally of opposite sides of the stud and extend almost to the head; whereby when the stud is rotated the arms engage said engagement portions and are bent back relative to the stud and cam on the engagement portions to cause the free ends to move to and clampingly engage said engagement faces; each curved apex portion forming a hook to hold the yoke against wedging the triangular portions apart.

3. A stud element adapted to be secured in a hole in a work structure having at its inner face marginal notches in the hole and engagement portions therebetween having exposed engagement faces, said element comprising a stud rotatable in said hole and having a head engageable with the outer face of said structure; the inner end portion of the stud being providedwith a pair of transverse apertures at right angles to each other but oiset from each other longitudinally of the stud; said end portion having at the free end a pair of triangular portions having their bases at opposite sides of the adjacent aperture nearest to said free end, the apexes of the triangular portions being at opposite ends of the adjacent aperture, the apex part of each portion being disposed over the aperture and contacting the other portion at the end of the aperture remote from the apex part of said other portion; said portions contacting each other from apex to base and enclosing completely the sides of the aperture, the outer faces of said portions the free end a pair of triangular portions having forming a rounded end of the stud; and a pair of substantially U-shaped wire locking members, each having a straight transverse yoke in one of said apertures and two arms adapted to be initially disposed longitudinally of opposite sides of the stud and adapted to be disposed in said notches and to have their free ends extend a1- most to the head; whereby when the stud is rotated the arms engage said engagement portions and are bent back relative to the stud and cam on the engagement portions to cause said free ends to move to and clampingly engage said engagement faces.

ERNEST SCI-ILUETER.

6 References Cited in the ie of this patent UNITED STATES PATENTS Number Name Date Brooks Oct. 1, 1872 Neil Dec. 11, 1906 Smith Oct. 6, 1908 Lytton May 31, 1927 Bengtsson Jan. 26, 1932 Zahodiakin Nov. 11, 1941 Von Opel July 19, 1949 

